DNA sequencing using the chain termination method
DNA sequencing using the chain termination method
DNA sequencing gel showing the separation of fragments in the four sequencing reactions (one per lane)
DNA sequencing gel showing the separation of fragments in the four sequencing reactions (one per lane)
In DNA sequencing using dideoxynucleotides labeled with fluorescent dyes, all four ddNTPs are added to the same tube, and during primer extension, all combinations of chains are produced
In DNA sequencing using dideoxynucleotides labeled with fluorescent dyes, all four ddNTPs are added to the same tube, and during primer extension, all combinations of chains are produced
2、隔裂基因和重叠基因 (1)、隔裂基因(split gene) 内含子(intron) 外显子(exon) (2)重叠基因(overlapping genes) 1977, Sanger: ΦX174测序 ABCABCABCABCABCABCABC . 基因基本特性:①自体催化 ②异体催化 ③ 突变 通读框(open reading frame)
2、隔裂基因和重叠基因 (1)、隔裂基因(split gene) 内含子(intron) 外显子(exon) (2)重叠基因(overlapping genes) 1977, Sanger: ΦX174测序 ABCABCABCABCABCABCABC . 基因基本特性:①自体催化 ②异体催化 ③ 突变 通读框(open reading frame)
二、生化突变型与一基因一酶学说 1941 ,Beadle & Tatum 提出: “ one gene one enzyme” hypothesis ↓ ↓ ↓ ↓ N- 乙酰 鸟氨酸 瓜氨酸 精氨 精氨酸 鸟氨酸 琥珀酸 氨甲酰磷酸 天冬氨酸 图:精氨酸生物合成途径 乙酰鸟 鸟氨酸精 精氨琥珀 精氨琥珀 氨酸酶 氨甲酰酶 酸合成酶 酸裂解酶
二、生化突变型与一基因一酶学说 1941 ,Beadle & Tatum 提出: “ one gene one enzyme” hypothesis ↓ ↓ ↓ ↓ N- 乙酰 鸟氨酸 瓜氨酸 精氨 精氨酸 鸟氨酸 琥珀酸 氨甲酰磷酸 天冬氨酸 图:精氨酸生物合成途径 乙酰鸟 鸟氨酸精 精氨琥珀 精氨琥珀 氨酸酶 氨甲酰酶 酸合成酶 酸裂解酶